Finding the Third Proportional to 72,345 and 156,763.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,345 : 156,763.50 = 156,763.50 : x
2. Step 2: Convert to fraction form
   72,345/156,763.50 = 156,763.50/x
3. Step 3: Cross multiply
   72,345x = 156,763.50 × 156,763.50
4. Step 4: Simplify right side
   72,345x = 24,574,794,932.25
5. Step 5: Solve for x
   x = 24,574,794,932.25/72,345
6. Step 6: Final answer
   x = 339,688.92